1.	Simplify 1 Simplify the following expression: $$ \left(3 + -5\right)\left(5 + 3\right) + {\left(-1 - 2\right)}^{2} $$ Correct Answer $$ -7$$ or -7.00000

2.	Simplify 2 Simplify the following expression: $$ \frac{2\times1(-4)}{\left(-5 - 2\right)\left(1 + 2\right)} $$ Correct Answer $$ \frac{8}{21}$$ or 0.380952

3.	Fractions 1 Simplify the following expression: $$ \frac{5}{6} + \frac{-1}{4} $$ Correct Answer $$ \frac{7}{12}$$ or 0.5833333333333334

4.	Fractions 2 Simplify the following expression: $$ \frac{6}{2}\frac{3}{4} $$ Correct Answer $$ \frac{9}{4}$$ or 2.25

5.	Significant figures 1. Write the following to 3 significant figures: 120.00589 Correct Answer 120 or $$1.20\times10^{2}$$ 2. Write the following to 5 significant figures: 0.00068951681 Correct Answer 0.00068952 or $$6.8952\times10^{-4}$$

6.	Standard Form 1. Write the following in standard form to 3 significant digits: 0.000330340 Correct Answer $$3.30\times10^{-4}$$ 2. Write the following in standard form to 5 significant digits: 87689.6 Correct Answer $$8.7690\times10^{4}$$

7.	Significant figures 1. Write the following in preferred standard form to 4 significant digits: 0.00000096898 Correct Answer $$969.0\times10^{-9}$$ 2. Write the following in preferred standard form to 4 significant digits: 0.018124 Correct Answer $$18.12\times10^{-3}$$

8.	Simplify 2 Simplify the following expression: $$ 2\times5\times5\left(\frac{-3}{-3} + 3 - 5\right) $$ Correct Answer $$ -50$$ or -50.0000

9.	Simplify 1 Simplify the following expression: $$ \left(-3 + -6\right)\left(2 + 3\right) + {\left(-1 + -4\right)}^{2} $$ Correct Answer $$ -20$$ or -20.0000

10.	Simplify 2 Simplify the following expression: $$ \frac{2\times2\times6}{3 - -5 + 4 - 2} $$ Correct Answer $$ \frac{12}{5}$$ or 2.40000